Electron microscope



FIG. 1 is a front, top and right side perspective view of an electron microscope showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged view of the portion indicated by lines 8 in FIG. 2.

The broken lines of FIG. 8 are for illustrative purposes of the boundaries of the enlarged view and form no part of the claimed design. 

CLAIM We claim the ornamental design for an electron microscope, as shown and described. 